¿Cuál es la concentración molar de una solución preparada disolviendo 7 g de KOH (masa molar: 56,11g/mol) en agua y completando en matraz de aforo hasta un volumen de 250 mL?

Some liquids can be distilled, but only at temperatures that are so high that it is impractical, or so high the compound decomposes. explain why distillation such compounds at significantly less than atmospheric pressure (some degree of vacuum) would solve this problem.